Arduino Duemilanove AC Load Shield

I have had a ton of these Intel 87C51 boards with 4 and 8 optically isolated triac output daughter boards attached to them. They are new surplus items I picked up several years ago. I recently purchased an Arduino Duemilanove and decided it was time to find some use for these. All it took was a couple of harnesses salvaged from an old AT computer case, a 60 watt lamp & socket and I was up and running. The 5v and Gnd are supplied from the spk out plug that all pc cases have. The AC side connector is the same as the AT style PC power supply connection. The I/O pins can be plugged directly into the bottom of the board so this makes a great shield. This would be great for using to drive light shows or drag strip lighting systems. The TRIACs on this board can handle 70 amps peak and 8 amps RMS! One word of caution if you are not familiar with AC circuits and qualified please do not mess with it. Not only does it hurt like heck if you get into it, IT CAN KILL! For example all of those unused wires on that AT power supply connector that I don’t have anything hooked to are hot. Anyway here is a short video.

void setup() {
// initialize the digital pins as an outputs:
pinMode(ACPin12, OUTPUT);
pinMode(ACPin11, OUTPUT);
pinMode(ACPin10, OUTPUT);
pinMode(ACPin9, OUTPUT);
}
void loop()
{
digitalWrite(ACPin12, HIGH); // set the Pin 12 on
delay(500); // wait for a second
digitalWrite(ACPin12, LOW); // set the Pin 12 off
delay(500); // wait for a second
digitalWrite(ACPin11, HIGH); // set the Pin 11 on
delay(500); // wait for a second
digitalWrite(ACPin11, LOW); // set the Pin 11 off
delay(500); // wait for a second
digitalWrite(ACPin10, HIGH); // set the Pin 10 on
delay(500); // wait for a second
digitalWrite(ACPin10, LOW); // set the Pin 10 off
delay(500); // wait for a second
digitalWrite(ACPin9, HIGH); // set the Pin 9 on
delay(500); // wait for a second
digitalWrite(ACPin9, LOW); // set the Pin 9 off
delay(500); // wait for a second
}

I see your post is early this year, but do you still have these controller boards available? I’d love to demo more than LEDs (though I do luv ‘em).

I work with students, grade school through Universities (Johns Hopkins, MD Institute College of Art (artists joined with tech is fascinating), Univ of MD, etc), helping them with basic electronics, microcontrollers, etc. It’s all kinda associated around our yearly event Robot Fest (a bit out of date: robotfest.com). It’d be cool/eye-opening to show micro’s controlling bigger stuff!